{"instruction": "You are an expert in event extraction. Please extract events from the input that conform to the schema definition. Return an empty list for events that do not exist, and return NAN for arguments that do not exist. If an argument has multiple values, please return a list. Respond in the format of a JSON string.", "schema": [{"event_type": "discover vulnerability", "trigger": true, "arguments": ["vulnerability", "time", "vulnerable system", "vulnerable system version", "common vulnerabilities and exposures", "discoverer", "capabilities"]}, {"event_type": "phishing", "trigger": true, "arguments": ["victim", "time", "trusted entity", "damage amount", "place", "attacker", "attack pattern", "tool"]}, {"event_type": "ransom", "trigger": true, "arguments": ["place", "attacker", "tool", "victim", "payment method", "price"]}, {"event_type": "data breach", "trigger": true, "arguments": ["purpose", "compromised data", "number of victim", "time", "tool", "victim", "number of data", "damage amount", "attacker", "place"]}], "input": "McCoy and his collaborators took advantage of the public nature of the bitcoin blockchain technology to trace ransom payments over a two - year period ¬ ."}
{"discover vulnerability": [], "phishing": [], "ransom": [{"trigger": "ransom payments", "arguments": {}}], "data breach": []}